The incubation period of influenza is usually two days but can range from one to four days. What are the symptoms of influenza? Typical influenza disease is characterized by abrupt onset of fever, aching muscles, sore throat, and non-productive cough. Additional symptoms may include runny nose, headache, a burning sensation in the chest, and eye pain and sensitivity to light. Typical influenza disease does not occur in every infected person.
ACTION: If sleeping on your left side doesnât help, and heartburn and indigestion are still proving a problem, prop up the head of your bed slightly, so that the upper body is higher than the stomach. This can help reduce acid reflux when sleeping, as gravity keeps the acid in the stomach.
It will usually be a pressure, ache or tight band of pain on the left side of your chest. It can then spread up to your neck and jaw and make you breathless, faint and sweaty. Indigestion (confusingly called âheartburnâ) typically starts in the upper abdomen and moves up behind your breastbone.